Pressure fluid motor



F. H. UMBERGER PRESSURE FLUID MOTOR Jan. 23, 1951 2 Sheets-Sheet 1 FiledMay 29, 1947 PRESSURE FLUID MOTOR Filed Ma 29, 1947 2 Sheets-Sheet 2 INV EN TOR.

Patented Jan. 23, 1951 UNITED STATES PA'I.-EI IT OFFICE R SSURE FLUIDMOT R Franklin H. Umberger, Newport, Oreg. Application May 29, 1947,Serial No. 751,337

1 Claim. i

This invention relates to fluid pumps.

An object of the invention is to provide a fluid pump, actuated by meansof a vacuum actuated motor for pumping measured quantities of fluid asneeded.

Another object of the invention is to provide a pumping device which isdriven by means of a reciprocating vacuum motor having valves forcontrolling its motion, and having electrically actuated solenoid meansfor regulating the operation of the valvcs.

A further; object of the invention is to provide a vacuum operatedelectrically controlled li uid pump which is simple in design,inexpensive to manufacture, and which is effective for the purposeintended, with a minimum of maintenance and at low cost of operation.

Other objects and advantages of the invention will become apparent fromthe following descrip tion of a preferred embodiment thereof, asillustrated in the accompanying drawings, in which:

Figure l is a left end elevation of the device shown in Figure, 2

Figure 2 is a sectional elevation taken on line 2-..-2 of' 'l igiure- 1.

Figure 3 is a fragmentary sectional plan view taken on; line 3-3, ofFigure 2,

Figure 4 is a sectional elevational view of the vacuum piston and shaft.

Figure 5 is a detail elevational view of the vacuum valve plunger.

In certain types of manufacturing it isnecessary to deliver measuredquantities of liquid to containers such as cans, bottles, jars, cartons,and the like, at intermittent and varied spieds. present inventiondiscloses a machine that will perform this function adequately andsatisfactorily at a high rate of speed.

In order to understand the nature of the invention and the best meansfor carrying it out, reference may be had to the drawings, in which likenumerals denote similar parts throughout the several views.

As shown, there is a vacuum motor cylinder It mounted between twocylinder heads i2 and l 4, the assembly being secured together by meansof through-bolts 16 extending through aligned apertures i8 formed in thecylinder heads.

A piston shaft 263 extcnds through the cylinder H3, being slidablysupported in a guide bushing 22, which is threaded into a bore 24 formedin the cylinder head l2. A lock nut 25 is threaded onto the guidebushing 22 outside the cylinder head, so as to make adjustable the totallength of the bushing which extends into the cylinder The it, its rightend 28 thus constituting an abutment' which may be ter ed a piston stop,as will be morev fully explained below. I

A packing, gland nut 3!), which is recessed to receive a gland packing32, of any suitable material, is threaded upon the outerend of the guidebushing 22, as best seen in Figures 1 and 2, the shaft being slidablehorizontally therethrough. A vacuum piston 34 is reciprocally movable inthe vacuum cylinder H), being secured to the piston shaft 2%] by meansof nut :56, so as to move with the piston shaft.

The piston, as best seen in Figures 2- and 4', has a, body portion 33with an annular recess 40 formed therein to receive the webs 42 of twoopposed piston cups 44 which are formed of flexible material, such asleather or the like, and having outer flanges :36 adapted to slidably'engage against the inner Wall surface of the cylinder, in to form atight seal therebetwezn. The cups 44 have their webs i-2' retained inthe recess 40 by means of an annular retaining ringAB which is held inposition by means of a plurality of, re-

taining' screws 56. If desired, the piston 34 may carry piston rings toeiiect a seal with the walls of the cylinder l0.

The piston shaft 20 also extends slidably through an a-perture52 formedin the other-cylinderhead It, the aperture being enlarg'ed'to reciive agland packing 54 held in position, bya nut 58. p v g A valve housingttissecured to the cylinder heads i2 and hi by means of screws extendingthrough apertures formed in the flanges 62 in the valve housing, andinto threaded bores formed in the cylinder heads I2 and I4. The valvehousing 58 is so designed that it may be turned end-for-end. The pump towhich it is connected may be powered with air pressure and maintain thesame timing, and can be driven by steam or water. Consequently, thedevice constitutes a universal pump, adaptable to either vacuum orpressure for driving power. A valve sleeve 54 is disposed in a valvebore 66 formed in the valve housing 58, as best shown in Figures 2 and3, the valve sleeve having three horiaontal circular rows 57, t8, andN3, of sleeve ports formed therein. Three annular verticallyspacedgrooves 12, M, and 16 are formed in the valve housing bore 66, so as toencircle each of the rows of sleeve ports such as 61, each row of sleeveports thus providing communication between its encircling groove such as12, and the interior [8 of the valve sleeve 64.

Two ports and 82, formed in the opposite cylinder heads l2 and [4, areconnected respectively with the annular grooves I6 and 12 by means ofducts 84 and 86 respectively. A source of suction is connected by meansof pipe 88, and through a duct 99 to the middle annular groove 14. Aslide valve plunger 92 comprising a shaft 94 and two spaced collars orvalve pistons 96 and 98 is slidable vertically in the valve sleeve 64,its valve pistons being spaced as shown in Figure 2 for a purpose thatwill be described hereinafter.

The upper end of the plunger 94 is secured to a solenoid plunger H10which is movable upwards when its solenoid I02 is actuated by currentthrough leads H14 from a source of power, not

shown, as a switch we is closed, the opening of the switch )6 causingthe valve plunger 94 to fall to its lower position. With the valve 94 inits lower position, shown in Figure 2, the suction from line 88 isapplied through the annular grooves I4 and I6 and the duct 84 the leftside of piston 34, drawing it to the left, which results in moving aworking piston I98 also secured to shaft 29 to the left in a workingcylinder H9, and drawing a quantity of fluid into the working cylinderH0 through an intake valve H2.

There may be a plurality of such working pistons I08 and workingcylinders H9, to comprise a multiple pump. For example, the shaft 26extends to the left to operate another cylinder H0, so that each cyclewill deliver a charge from a cylinder I 10. For high speed, by hookingboth intakes H2 together, the pump will charge one cylinder Hi3 whiledischarging the other. By connecting each pump to a separate container,the pump will deliver one or more different fluids with the same motor.

The solenoid I02 being actuated, the valve plunger 94 is elevated to itsupper position, bringing the annular groove 14 into communication withthe annular groove 12, and allowing suction to be applied to theopposite side of the pis- .ton 34 through duct 86, which moves thepiston 34 to the right and exhausts the fluid from cylinder Iln throughvalve H4 as the piston I08 moves to the right. The cylinder H9 is spacedfrom the cylinder head [4 by the spacers I I5.

It will be apparent that the length of the stroke of piston 34 isdetermined by the position of the abutment 28 on the inner end of theguide bushing 22, so that this may easily be adjusted as desired.

The solenoid I02 is supported upon a bracket H6 carried on the valvehousing.

Although I have described a preferred embodiment of my invention inspecific terms, it is to be understood that various changes may be madein size, shape. materials, and arrangement without departing from thespirit and scope of the invention as claimed.

What is claimed is:

In a pressure fluid motor comprising a cylinder, a piston reciprocabletherein, a pair of cylinder heads disposed at the ends of the cylinder,a valve housing, a movable valve member in the housing, and a solenoidmounted above the valve housing with a movable core therein connected tothe valve member, the features which include having the valve housingfixed upon the cylinder heads with the axis of the valve member and thesolenoid disposed at right angles to the axis of the cylinderintermediate the ends of the latter, a stationary valve sleeve securedin said valve housing above said cylinder with open top and bottom andthe movable valve member comprising a valve plunger and two valvepistons spaced apart on the valve plunger and slidable in the valvesleeve, having the cylinder heads individually provided with portsleading into the ends of the cylinder and fluid passages from the portsextending up into said valve housing, the valve sleeve having a group ofports disposed within the upper end thereof communicating with one ofsaid fluid passages and a second group of ports within the lower end ofthe sleeve communicating with the other of said fluid passages, saidvalve housing having a further fluid passage therein extending to theintermediate portion of the valve sleeve and said valve sleeve having athird group of ports intermediate the first and second groups of portscommunicating with the further fluid passage in said valve housing, anda pressure fluid supply pipe connected to said further fluid passage insaid valve housing and leading to a pressure fluid source.

FRANKLIN H. UMBERGER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 15,211 Henry June 24, 18561,863,448 Landenberger June 14, 1932 2,194,782 Baade Mar. 26, 19402,252,939 McCoy Aug. 19, 1941

